Online aids: Calculators and simulators

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Calculators and simulators:
I. Market fundamentals
   Illustrating consumer demand (Excel)
   Arc elasticity calculator (Excel)
   Point elasticity: calculating and illustrating (Excel)
II. Consumer theory
   Budget line calculator (Excel)
   Indifference curves and the marginal rate of substitution:
   Calculations and illustrations (Excel)
   Quick calculator (Excel)
   The consumer optimum:
   Comparing optimal and nonoptimal consumption bundles (Excel)
   Calculating and illustrating a consumer optimum (Excel)
   Quick calculator (Excel)
   Exploring the consumer's optimum (Java) (price and income changes, substitution and income effects, etc.)
   The Edgeworth box for exchange (Java)
      Lottery (Visual Basic)